Document Detail

Zinc deficiency induces dysregulation of cytokine productions in an experimental colitis of rats.
MedLine Citation:
PMID:  23268956     Owner:  NLM     Status:  In-Data-Review    
Dextran sulfate sodium (DSS)-induced colitis is an experimental model of ulcerative colitis, although the precise mechanism has not yet been elucidated. We investigate whether Zn deficiency affects the pathogenesis of colitis induced by DSS with a focus on immune responses. Male WKAH/Hkm Slc rats were fed either a Zn-adequate (ZA, 30 mg Zn/kg diet) as a control or Zndeficient (ZD, 5 mg Zn/kg diet) diet for 21 days and then treated with 2% DSS via deionized drinking water for 7 days. The disease activity index (DAI) was recorded daily throughout DSS treatment. Serum Zn concentrations were significantly lowered in rats fed the ZD diet than those fed the ZA diet at day 7 and 14. Surprisingly, DSS treatment considerably reduced the serum Zn in both groups. The rats fed the ZD diet showed exacerbated colitis based on clinical outcomes, including weight loss, increased DAI, and shortened colon length. An in vitro study corroborated these results, showing that a large amount of TNFα was induced by rat mesenteric leukocytes in response to lipopolysaccharide in ZD medium, but not in ZA medium. These results indicate that a modulation of TNFα production due to Zn deficiency influences disease activity in DSS-induced colitis. In addition, more attention should be given to Zn for prevention of colitis.
Erwin Suwendi; Hitoshi Iwaya; Jae-Sung Lee; Hiroshi Hara; Satoshi Ishizuka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biomedical research (Tokyo, Japan)     Volume:  33     ISSN:  1880-313X     ISO Abbreviation:  Biomed. Res.     Publication Date:  2012  
Date Detail:
Created Date:  2012-12-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8100317     Medline TA:  Biomed Res     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  329-36     Citation Subset:  IM    
Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan.
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